U.S. regulators, acting after a oil-train derailment last year ignited a fireball that killed 47 people in Canada , said they intend to require at least two crew members for crude shipments, a proposal opposed by the railroads. The Federal Railroad Administration also will establish minimum crew size standard for most freight trains and passenger rail lines, the agency said in a statement today. “We are committed to taking the necessary steps to assure the safety of those who work for railroads and shippers, and the residents and communities along shipping routes,” Transportation Secretary Anthony Foxx said in a statement. The agency is acting after a train that was operated by one person was left unattended for the night in July and rolled into the center of Lac-Megantic, triggering a fatal explosion that destroyed half the town. The Association of American Railroads , whose members include Berkshire Hathaway Inc.’s […]